Speaking-telephone



(No Model.)

IF. WARE.

. SPEAKING. TELEPHONE.

Patented Feb. 5, 1884.

s //4 .E M/ N UNITED STATES PATENT GFFICE.

FRANCIS \VARE, OF BOSTON, MASSACHUSETTS.

SPEAKING-TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 292,881, dated February 5, 1884. I Application filed August 23, 1883. No model.)

To all whom it may concern:

Be it known that I, FRANCIS WVARE, of Boston, in the State of Massachusetts, have invented a newand useful Improvement Speaking-Telephones, of which the following is a specification.

It is almost universal in the construction of spcaking-telephones,'both magneto and battery telephones, to inclose the operative parts ina box in such manner as to leave a small chamber in the rear of the diaphragm for its'protection, and also an exceedingly thin cavity or inclosure in its front, which communicates with the mouth of the speaker by a small hole in the face of the box, opposite the center of the diaphragm. The face of the box is generally of considerable thickness, and the hole through it in front of the diaphragm is made sufficiently flaring to serve for a speaking-tube or mouth-piece. The thin cavity or inclosure in front of the diaphragm has been found to possess marked advantages in intensifying the effect and preventing the formation of false tones. I have found thatthe soundstransmitted from the voice to the diaphragm will be still further intensified, without serious detrim cut to the articulation, if they are first 'sp okeu into a small chamber of substantially globular or oval form, communicatingimmediately with the thin inclosure in front of the diaphragm by a small hole between said globular or oval chamber and said thin inclosure. The advan tage is especially marked when the improvement is applied to a telephone used upon a long line.

111 the drawings I have shown myinvention as applied to the well-known Blake transmitter, Figure 1 being asection, and Fig. 2, a partial front view, of the modified instrument.

A is the box in which the operative parts of the telephone are inclosed, as stated above,

a being the side or face opposite the diaphragm d, which is supported, as are the other operative parts of the telephone, in the usual manner. The thin chamber or inclosure in front of the diaphragm is marked 0.

G is the substantially oval or globular chamber above mentioned. It consists of or is formed by the flaring aperti1re'b,which ordinarily serves for the mouth-piece of the telephone, and a cup, D, placed in front of said aperture, as shown, the said cup and the said aperture substantially corresponding in shape and size. The cup D has a hole opposite the hole in the face of the box in front of the dia phragm, and of substantially the same size, and'in front of this hole there is attached to the cup a new mouth-piece, e, as shown. For convenience, the cup D, with its mouth-piece e, is hinged to the face a of the box by means of a flange, f, and a pin, 1), so that itwill fall by gravity out of position for use when not requi red.

Speech received through an ordinary recei ving-instrument from a transmitter embracing myimprovement is louderthan when received under the same conditions from the same instrument without the improvement, while the articulation is sufficiently good for all practi cal purposes.

I claim- The combination, with the diaphragm of a telephone and a box or casing therefor, so applied as to leave a thin inclosure or chamber between the face of the said diaphragm and the said box or casing, of a substantially oval or globular chamber communicating with said thin inclosure or chamber, substantially as described.

FRANCIS WARE.

Vi tn esses:

WM. S. ROGERS, HENRY MrrorrnLL. 

